Kwiboo I have a RK3399 box (X99) for which I had a working 4.4 dts. I tried booting the rockpro64 img, but it gave an error wrt i2c on the serial console.
I ended up modifying the original 4.4 dts which got rid of the i2c error bringing it closer to rockpro64, but the screen is blank. There is an error regarding EDID is blank.
Let me know so I can provide any debug logs or dump of any parameters from serial console.
Code Display More# cat /sys/kernel/debug/dri/0/state plane[31]: plane-0 crtc=(null) fb=0 crtc-pos=1024x768+0+0 src-pos=1024.000000x768.000000+0.000000+0.000000 rotation=1 normalized-zpos=0 color-encoding=ITU-R BT.601 YCbCr color-range=YCbCr limited range plane[33]: plane-1 crtc=(null) fb=0 crtc-pos=0x0+0+0 src-pos=0.000000x0.000000+0.000000+0.000000 rotation=1 normalized-zpos=0 color-encoding=ITU-R BT.601 YCbCr color-range=YCbCr limited range plane[36]: plane-2 crtc=crtc-0 fb=44 allocated by = kodi.bin refcount=2 format=XR24 little-endian (0x34325258) modifier=0x0 size=1024x768 layers: size[0]=1024x768 pitch[0]=4096 offset[0]=0 obj[0]: name=0 refcount=3 start=00000000 size=3145728 imported=no crtc-pos=1024x768+0+0 src-pos=1024.000000x768.000000+0.000000+0.000000 rotation=1 normalized-zpos=0 color-encoding=ITU-R BT.601 YCbCr color-range=YCbCr limited range plane[38]: plane-3 crtc=(null) fb=0 crtc-pos=0x0+0+0 src-pos=0.000000x0.000000+0.000000+0.000000 rotation=1 normalized-zpos=0 color-encoding=ITU-R BT.601 YCbCr color-range=YCbCr limited range crtc[35]: crtc-0 enable=1 active=1 planes_changed=1 mode_changed=0 active_changed=0 connectors_changed=0 color_mgmt_changed=0 plane_mask=4 connector_mask=1 encoder_mask=1 mode: "1024x768": 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa connector[41]: HDMI-A-1 crtc=crtc-0 hdr_metadata_changed=0
Code Display More[ 8.659739] rockchip-drm display-subsystem: HDMI-A-1: EDID is invalid: [ 8.659794] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 8.659801] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 8.659805] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 8.659810] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 8.659814] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 8.659818] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 8.659822] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 8.659826] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 8.677009] SWITCH_REG1: supplied by vcc3v3_sys [ 8.689483] SWITCH_REG2: supplied by vcc3v3_sys [ 8.738088] Console: switching to colour frame buffer device 128x48 [ 8.743182] rk808-rtc rk808-rtc: registered as rtc0 [ 8.775272] rockchip-drm display-subsystem: fb0: frame buffer device
You will need a 5.1 not 4.4 dts kernel file to test with mainline images used here.
But I can't help further.